PLEAS HELP A solar panel produces up to 320 watts of power from 1500 watts of sunlight. What is the efficiency of the panel?

This is for APES (AP Environmental Science) btw

When water freezes, it . contracts expands

Can happen anywhere along the spine if the neural tube does not close all the way. the backbone that protects the spinal cord does not form and close as it should. this often results in damage to the spinal cord and nerves. a) cleft palate b) spina bifida c) encephalocele d) down's syndrome

The assembly called for a "bill of rights" that would list u.s. citizens'